JP2003053371A - Aeration mixing apparatus - Google Patents
Aeration mixing apparatusInfo
- Publication number
- JP2003053371A JP2003053371A JP2001248973A JP2001248973A JP2003053371A JP 2003053371 A JP2003053371 A JP 2003053371A JP 2001248973 A JP2001248973 A JP 2001248973A JP 2001248973 A JP2001248973 A JP 2001248973A JP 2003053371 A JP2003053371 A JP 2003053371A
- Authority
- JP
- Japan
- Prior art keywords
- air
- draft tube
- stirring
- aeration
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排水を活性汚泥処
理等の生物学的処理方法で浄化処理する水処理装置にお
ける活性汚泥への酸素供給および混合用の曝気撹拌装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aeration stirring device for supplying and mixing oxygen to activated sludge in a water treatment device for purifying wastewater by a biological treatment method such as activated sludge treatment.
【０００２】[0002]
【従来の技術】従来から排水の活性汚泥処理ではドラフ
トチューブ式下降流型曝気撹拌装置が用いられている。
この装置は、ドラフトチューブ内に設けられた撹拌羽根
の回転により下降流を生じさせ、この流体により、羽根
下流側に設置された空気供給手段から供給される空気を
細断する。細断された空気は、微細な気泡となってチュ
ーブ内を下方に流れる。この過程において微細な空気は
液中に溶け込み、微生物に必要な溶存酸素を供給する。2. Description of the Related Art Conventionally, a draft tube type down-flow aeration agitator has been used in the treatment of activated sludge of waste water.
In this device, a downward flow is generated by the rotation of a stirring blade provided in the draft tube, and this fluid chops the air supplied from the air supply means installed on the downstream side of the blade. The shredded air becomes fine bubbles and flows downward in the tube. In this process, fine air dissolves in the liquid and supplies the dissolved oxygen necessary for the microorganisms.
【０００３】このように、この撹拌羽根の回転によっ
て、処理槽内液の活性汚泥の沈降を防止するための撹拌
と、活性汚泥へ供給される空気の細断が行われ、一方、
空気供給はブロワ等により行われる。こうして撹拌・細
断と空気供給を別々の手段で行うことにより、例えばＤ
Ｏ（Dissolved Oxygen：溶存酸素濃度）の制御等をラフ
に行う場合には管理がし易いといった特徴がある。さら
に個別に運転を調整することにより、それぞれが有する
最適な効率点での運転が可能である。As described above, the rotation of the stirring blade causes stirring for preventing the settling of the activated sludge in the liquid in the treatment tank and shredding of the air supplied to the activated sludge.
Air is supplied by a blower or the like. In this way, by performing stirring and shredding and air supply by different means, for example, D
When the control of O (Dissolved Oxygen) is roughly performed, it is easy to manage. Further, by adjusting the operation individually, it is possible to operate at the optimum efficiency point that each has.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、ドラフ
トチューブ式下降流型曝気撹拌方式では、上述のよう
に、処理槽内液の活性汚泥の沈降を防止するための撹拌
と、活性汚泥へ供給される空気の細断を、撹拌羽根の回
転により生じる水流に依存している。このように異なる
二つの役割を一つの手段に依存するため、より精密さを
要求されるＤＯ制御等については、ＤＯ制御性がやや困
難となり、また、空気の細断に大きな動力を要する等の
欠点があった。However, in the draft tube type downflow aeration agitation system, as described above, the agitation for preventing the settling of the activated sludge in the liquid in the treatment tank and the supply to the activated sludge are carried out. The shredding of air depends on the water flow produced by the rotation of the stirring blades. As described above, since two different roles depend on one means, for DO control or the like that requires higher precision, the DO controllability becomes somewhat difficult, and large power is required for shredding air. There was a flaw.
【０００５】また、ドラフトチューブ式機械曝気撹拌装
置では、上述のように、撹拌・細断と空気供給を個別に
最大効率点で運転することにより、両者が必要とする動
力を効率的に低減できる特徴があった。特に少ない空気
供給でも、すなわちブロワ等の動力が少なくても、撹拌
・細断能力が高いため、活性汚泥に必要な酸素を供給す
ることが可能であった。Further, in the draft tube type mechanical aerating and agitating device, as described above, by separately operating the agitating / shredding and the air supply at the maximum efficiency point, the power required by both can be efficiently reduced. There was a feature. Even with a small amount of air supply, that is, even when the power of the blower or the like is small, the stirring and shredding capacity is high, so that it was possible to supply the oxygen required for the activated sludge.
【０００６】ところが、近年、施設の更新時に、空気供
給手段であるブロワ等は既存のままで、酸素供給手段の
みの更新を検討する例が増えている。However, in recent years, when renewing facilities, there are an increasing number of cases where the blower, which is an air supply means, is still existing, and only the oxygen supply means is considered to be renewed.
【０００７】ドラフトチューブ式機械曝気撹拌装置の最
大の特徴は、この撹拌・細断と空気供給手段を効率的に
個別に運転することにより、トータル動力コストを下げ
る点にある。本装置ではもともと空気供給手段に要する
動力は小さく、撹拌・細断に要する動力が相対的に高
い。このため、空気供給手段のみ既設ブロワ等を利用す
るといった、予め固定された動力条件下では、トータル
動力コストの低減化が図れない。The greatest feature of the draft tube type mechanical aeration and agitation device is that the total power cost is lowered by efficiently operating the agitation / shredding and the air supply means individually. In this device, the power required for the air supply means is originally small, and the power required for stirring and shredding is relatively high. Therefore, the total power cost cannot be reduced under a power condition that is fixed in advance, such as using an existing blower only for the air supply means.
【０００８】本発明は、以上の実状に鑑み、既存の空気
供給手段を最大限に利用し、かつドラフトチューブ式機
械曝気撹拌装置の特徴を生かした装置を提供することを
課題とするものである。In view of the above situation, it is an object of the present invention to provide an apparatus which makes the best use of the existing air supply means and which makes the best use of the features of the draft tube type mechanical aeration and stirring apparatus. .
【０００９】[0009]
【課題を解決するための手段】本発明は、上記課題を解
決すべく工夫されたもので、処理槽内に垂直に配置され
たドラフトチューブと、ドラフトチューブ内に位置し、
かつモーターにより駆動軸を介して回転される撹拌手段
とを具備し、撹拌手段は、その撹拌羽根の回転によりド
ラフトチューブ内に下降流を発生させて同チューブ下端
からその外部を経て上端へ液を循環させる撹拌装置にお
いて、撹拌手段の撹拌羽根の上流側に散気手段が設けら
れていることを特徴とする曝気撹拌装置である。Means for Solving the Problems The present invention has been devised to solve the above-mentioned problems. It is a draft tube vertically arranged in a treatment tank, and is located in the draft tube.
The stirring means is rotated by a motor via a drive shaft, and the stirring means generates a descending flow in the draft tube by the rotation of the stirring blade, and the liquid is flown from the lower end of the tube to the upper end through the outside. In the agitating device to circulate, the aeration agitating device is characterized in that an air diffuser is provided on the upstream side of the agitating blade of the agitating device.
【００１０】本発明による曝気撹拌装置において、散気
手段と撹拌羽根の間に気泡ガイドが設けられていること
が好ましい。In the aeration and stirring apparatus according to the present invention, it is preferable that a bubble guide is provided between the diffusing means and the stirring blade.
【００１１】散気手段は、好ましくは１００μｍ以下の
微細気泡を発生させる散気板または散気管である。この
ような散気手段としてアタカ工業社製の「ディスクディ
フューザー」が好適に使用できる。The diffusing means is preferably a diffusing plate or a diffusing tube for generating fine bubbles of 100 μm or less. As such an air diffusing means, a "disk diffuser" manufactured by Ataka Kogyo Co., Ltd. can be preferably used.
【００１２】散気手段は、例えば、ドラフトチューブ内
の撹拌羽根の上流側にて同チューブ内面に沿って配され
たドーナツ状の散気板または散気管、ドラフトチューブ
内の撹拌羽根の上流側にて同チューブ外部に同心状に配
されたドーナツ状の散気板または散気管、または、ドラ
フトチューブの外側に放射状に配された多数の散気管ま
たは散気板である。The air diffusing means may be, for example, a donut-shaped air diffusing plate or air diffusing tube arranged along the inner surface of the stirring blade in the draft tube, or upstream of the stirring blade in the draft tube. Is a donut-shaped air diffusing plate or air diffusing tube concentrically arranged outside the tube, or a large number of air diffusing tubes or air diffusing plates radially arranged outside the draft tube.
【００１３】散気板または散気管のレベルは、処理液面
から下方０．３〜３ｍであることが好ましい。The level of the diffuser plate or diffuser tube is preferably 0.3 to 3 m below the processing liquid surface.
【００１４】[0014]
【作用】ドラフトチューブ式機械曝気撹拌装置の最大の
特徴は、撹拌手段が、その撹拌羽根の回転により処理槽
表面の流体を効率的にドラフトチューブ内に導き、ドラ
フトチューブ内に下降流を発生させて同チューブ下端か
らその外部を経て上端へ液を循環させるところにある。
この流体の持つ力を利用して、処理槽表面近傍で発生し
滞留している微細気泡含有流体をドラフトチューブ内に
導き、微細気泡の処理槽内滞留時間を長くすることによ
り、液中への酸素溶解を促進させる。The most significant feature of the draft tube type mechanical aeration and agitation device is that the agitation means efficiently guides the fluid on the surface of the treatment tank into the draft tube by the rotation of the agitation blade to generate a downward flow in the draft tube. The liquid is circulated from the lower end of the tube to the upper end through the outside.
By utilizing the force of this fluid, the fluid containing fine bubbles generated near the surface of the treatment tank is introduced into the draft tube, and the retention time of the fine bubbles in the treatment tank is lengthened to Promotes oxygen dissolution.
【００１５】そこで、本発明ではドラフトチューブ内の
撹拌手段の撹拌羽根の上流側に散気手段を設け、これを
介して既存ブロワ等を利用して液中に空気を供給する。
通常、既設ブロワは散気水深を４〜５メールとして設計
されるものが多く、相応の吐出力を有している。処理槽
表面近傍で曝気する場合には、この吐出力を利用して、
例えば高い曝気圧力を必要とする散気板を利用して、超
微細気泡を得ることができる。Therefore, in the present invention, an air diffuser is provided on the upstream side of the stirring blade of the stirring means in the draft tube, and the existing blower or the like is used to supply air into the liquid through the diffuser.
Usually, most of the existing blowers are designed to have an aeration water depth of 4 to 5 mails, and have a suitable discharge force. When aerating near the surface of the processing tank, use this discharge force to
For example, ultrafine bubbles can be obtained by using a diffuser plate that requires high aeration pressure.
【００１６】この微細気泡が、ドラフトチューブ内撹拌
羽根により、ドラフトチューブ内下部方向へ導かれ、酸
素の溶解が行われる。The fine air bubbles are guided toward the lower part in the draft tube by the draft blade in the draft tube to dissolve oxygen.
【００１７】従来は、撹拌羽根には、撹拌と空気細断の
両機能が要求されたが、本発明では微細気泡を散気手段
にて供給するため、空気細断の必要がない。これにより
撹拌・細断に要する動力の低減化が可能となるととも
に、撹拌と細断＋散気によるＤＯ制御が可能で、より精
密な制御が可能となる。Conventionally, the stirring blade has been required to have both functions of stirring and shredding air, but in the present invention, since fine air bubbles are supplied by the air diffusing means, shredding of air is not necessary. As a result, the power required for stirring and shredding can be reduced, and DO control by stirring and shredding + aeration can be performed, which enables more precise control.
【００１８】なお、実公昭５７−３１９４６号公報で
は、散気板を用いずに、ドラフトチューブ上部の液面か
ら渦流により大気を巻き込む方式が採られている。この
方式はエジェクタ方式の一つであるが、ドラフトチュー
ブ内部に巻き込まれる空気は、渦状となり、細断されに
くく、従って酸素溶解能が低下する。特公昭５５−２９
７５６号公報記載の装置は、上述した従来技術とほぼ同
じものであり、精密なＤＯ制御や、既設ブロワの使用を
前提とするような条件では、効率的でない。さらに特開
平５−１７７１９３号公報の装置は、撹拌羽根の上流に
スクリュウ旋回によるエジェクタを用いた自吸式酸素溶
解装置を設けたものである。エジェクタ方式により酸素
溶解効率は、通常、他の散気板方式に比べ劣る。これを
補いかつ槽内循環をするためドラフトチューブ内に別の
撹拌羽根を設けているが、結果的に効率の悪い装置とな
っている。It should be noted that, in Japanese Utility Model Publication No. 57-31946, a method is adopted in which the atmosphere is entrained by a vortex from the liquid surface above the draft tube without using a diffuser plate. This method is one of the ejector methods, but the air entrained inside the draft tube becomes a vortex and is not easily shredded, so the oxygen dissolving ability is reduced. Japanese Patent Publication 55-29
The device described in Japanese Patent No. 756 is almost the same as the above-mentioned conventional technique, and is not efficient under the condition that precise DO control and use of an existing blower are assumed. Further, the device disclosed in Japanese Patent Laid-Open No. 5-177193 is provided with a self-priming type oxygen dissolving device using an ejector by screw rotation upstream of a stirring blade. Due to the ejector method, the oxygen dissolution efficiency is usually inferior to other diffuser plate methods. In order to compensate for this and to circulate in the tank, another stirring blade is provided in the draft tube, but as a result, the device is inefficient.
【００１９】[0019]
【発明の実施の形態】本発明を実施例に基づいて具体的
に説明する。BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described based on Examples.
【００２０】実施例１
図１において、曝気撹拌装置は、処理槽(1) 内に垂直に
配置されたドラフトチューブ(2) と、ドラフトチューブ
(2) 内に位置し、かつモーター(3) により駆動軸(4) を
介して回転される撹拌手段(5) とを具備してなる。撹拌
手段(5) は、その撹拌羽根(6) の回転によりドラフトチ
ューブ(2) 内に下降流を発生させて同チューブ(2) 下端
からその外部を経て上端へ液を循環させる。撹拌手段の
撹拌羽根(6) の上流側に、散気手段がドラフトチューブ
(2) 外部に同心状に配されている。散気手段は、平均空
孔径８０〜１００μｍを有する多孔板状ドーナツ状の散
気板(7) である。散気管(7) のレベルは、処理液面から
下方０．６ｍである。なお撹拌羽根(6) と水面との距離
は１．４ｍである。散気管(7) にはブロワ(8) から給気
管(9) を介して空気が供給され、散気管(7) は気泡径１
００μｍ以下の微細気泡を発生させる。Example 1 In FIG. 1, the aeration and agitation apparatus is composed of a draft tube (2) vertically arranged in a treatment tank (1), and a draft tube.
And a stirring means (5) located inside (2) and rotated by a motor (3) via a drive shaft (4). The stirring means (5) generates a downward flow in the draft tube (2) by the rotation of the stirring blade (6), and circulates the liquid from the lower end of the tube (2) to the upper end through the outside. On the upstream side of the stirring blade (6) of the stirring means, the aeration means is a draft tube.
(2) They are arranged concentrically outside. The air diffusing means is a perforated plate-like donut-shaped air diffusing plate (7) having an average pore diameter of 80 to 100 μm. The level of the air diffuser (7) is 0.6 m below the processing liquid surface. The distance between the stirring blade (6) and the water surface is 1.4 m. Air is supplied from the blower (8) to the air diffuser (7) through the air supply pipe (9), and the air diffuser (7) has a bubble diameter of 1
Generates fine bubbles of 00 μm or less.
【００２１】実施例２
図２において、ドラフトチューブ(2) の上端はラッパ状
に拡大し、散気手段としてドーナツ状の散気板(7) がド
ラフトチューブ(2) 外部に同心状に配されている。散気
管(7) のレベルは、処理液面から下方１．５ｍである。
ドラフトチューブ(2) のラッパ状拡大部(2a)の上にはコ
ーン状の気泡ガイド(10)が配されている。Embodiment 2 In FIG. 2, the upper end of the draft tube (2) is expanded in a trumpet shape, and a donut-shaped air diffusing plate (7) is concentrically arranged outside the draft tube (2) as air diffusing means. ing. The level of the air diffuser (7) is 1.5 m below the processing liquid surface.
A cone-shaped bubble guide (10) is arranged on the trumpet-shaped enlarged portion (2a) of the draft tube (2).
【００２２】その他の構成は、図１に示す実施例１のも
のと同じである。The other structure is the same as that of the first embodiment shown in FIG.
【００２３】実施例３
図３において、ドラフトチューブ(2) の上端に設けられ
たラッパ状拡大部(2a)の内面に沿って、散気手段として
ドーナツ状の散気板(7) が配されている。散気管(7) の
レベルは、処理液面から下方０．５ｍである。Embodiment 3 In FIG. 3, a donut-shaped air diffusing plate (7) is arranged as air diffusing means along the inner surface of the trumpet-shaped enlarged portion (2a) provided at the upper end of the draft tube (2). ing. The level of the air diffuser (7) is 0.5 m below the processing liquid surface.
【００２４】その他の構成は、図１に示す実施例１のも
のと同じである。The other structure is the same as that of the first embodiment shown in FIG.
【００２５】実施例４
図４において、ドラフトチューブ(2) 外側に、散気手段
として多数の散気管(11)が放射状に配されている。Embodiment 4 In FIG. 4, a large number of air diffusing tubes (11) as air diffusing means are radially arranged outside the draft tube (2).
【００２６】その他の構成は、図１に示す実施例１のも
のと同じである。The other structure is the same as that of the first embodiment shown in FIG.
【００２７】比較例１
図５において、ドラフトチューブ(2) 内部において、散
気板(7) は撹拌手段の撹拌羽根(6) の下流に配されてい
る。Comparative Example 1 In FIG. 5, inside the draft tube (2), the air diffuser plate (7) is arranged downstream of the stirring blade (6) of the stirring means.
【００２８】その他の構成は、図１に示す実施例１のも
のと同じである。The other structure is the same as that of the first embodiment shown in FIG.
【００２９】評価試験
実施例１の曝気撹拌装置と比較例１の曝気撹拌装置にお
いて、同一条件で、槽底部流速が０．１ｍ／ｓとなるよ
うに撹拌羽根(6) の回転数を調整し、撹拌動力、ブロワ
動力および酸素溶解効率を測定した。この測定結果を表
１に示す。Evaluation test In the aeration and agitation apparatus of Example 1 and the aeration and agitation apparatus of Comparative Example 1, the rotation speed of the agitation blade (6) was adjusted under the same conditions so that the tank bottom flow rate was 0.1 m / s. , Stirring power, blower power and oxygen dissolution efficiency were measured. The results of this measurement are shown in Table 1.
【００３０】[0030]
【表１】 [Table 1]
【００３１】表１より明らかなように、酸素溶解効率は
ほぼ同程度であるのに対して、ブロワ動力は実施例１の
方が幾分高い。これは、散気水深は浅いが、散気板の必
要圧力が高いため、結果として動力が上がったものと思
われる。一方、撹拌動力は明らかに実施例１の方が小さ
い。これは、実施例１では予め微細化された気泡をドラ
フトチューブ内部に循環させる動力のみが必要であるの
に対し、比較例１では、撹拌羽根下部へ供給された空気
気泡群をドラフトチューブ内下部に流下させる動力と、
さらに該空気気泡群を細断する動力とが必要であるから
である。As is clear from Table 1, the oxygen dissolution efficiency is almost the same, but the blower power is slightly higher in Example 1. This is probably because the diffusing water depth was shallow, but the required pressure of the diffusing plate was high, resulting in increased power. On the other hand, the stirring power is obviously smaller in Example 1. This is because in Example 1, only the power to circulate the finely divided air bubbles inside the draft tube is required, whereas in Comparative Example 1, the air bubble group supplied to the lower portion of the stirring blade is in the lower portion of the draft tube. Power to let it flow down to
Further, it is necessary to have power for shredding the air bubble group.
【００３２】なお、比較例１の散気板(7) は気泡径０．
５〜１ｍｍの気泡を形成するのに対して、実施例１の散
気板(7) は気泡径８０〜１００μｍの気泡を形成するこ
とによる効果も大きい。The diffuser plate (7) of Comparative Example 1 had a bubble diameter of 0.
In contrast to forming bubbles of 5 to 1 mm, the diffuser plate (7) of Example 1 has a great effect by forming bubbles having a bubble diameter of 80 to 100 μm.
【００３３】[0033]
【発明の効果】酸素溶解には、曝気圧力の高い散気板を
利用して、超微細気泡を得ることが重要である。本発明
による曝気撹拌装置では、撹拌手段の撹拌羽根の上流側
に散気手段が設けられているので、散気水深を浅くする
ことができ、これにより既存のブロワを使用できる。こ
の微細気泡が、ドラフトチューブ内撹拌羽根により、ド
ラフトチューブ内を下部方向へ導かれ酸素溶解が行われ
る。In order to dissolve oxygen, it is important to obtain ultrafine bubbles by using a diffuser plate having a high aeration pressure. In the aeration stirrer according to the present invention, since the diffusing means is provided on the upstream side of the stirring blade of the stirring means, it is possible to make the diffused water depth shallow, and thus the existing blower can be used. The fine air bubbles are guided downward in the draft tube by the draft tube stirring blade to dissolve oxygen.
【００３４】従来は、この撹拌羽根には、撹拌と供給さ
れた空気の細断の機能が要求されたが、本発明では予め
微細気泡を散気手段にて供給するため、空気細断の必要
がなくなる。これにより撹拌・細断に要する動力の低減
化が可能となる。Conventionally, the stirring blade was required to have a function of stirring and shredding the supplied air, but in the present invention, since fine bubbles are previously supplied by the air diffusing means, it is necessary to shred the air. Disappears. This makes it possible to reduce the power required for stirring and shredding.
【図１】実施例１の曝気撹拌装置の概略を示す垂直断面
図である。FIG. 1 is a vertical cross-sectional view showing the outline of an aeration and agitation device of Example 1.
【図２】実施例の曝気撹拌装置の概略を示す垂直断面図
である。FIG. 2 is a vertical sectional view showing the outline of an aeration and agitation device of an example.
【図３】実施例３の曝気撹拌装置の概略を示す垂直断面
図である。FIG. 3 is a vertical sectional view showing the outline of an aeration and agitation device of Example 3.
【図４】実施例４の曝気撹拌装置の概略を示す垂直断面
図である。FIG. 4 is a vertical sectional view showing the outline of an aeration and agitation device of Example 4.
【図５】比較例１の曝気撹拌装置の概略を示す垂直断面
図である。5 is a vertical cross-sectional view showing the outline of an aeration / agitation device of Comparative Example 1. FIG.
(1) ：処理槽 (2) ：ドラフトチューブ (5) ：撹拌手段 (6) ：撹拌羽根 (7) ：散気板 (8) ：ブロワ (10)：気泡ガイド (1): Treatment tank (2): Draft tube (5): stirring means (6): Stirring blade (7): Air diffuser (8): Blower (10): Bubble guide
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中田 康介 大阪市西区立売堀２丁目１番９号 アタカ 工業株式会社内 Ｆターム(参考） 4D028 BC24 BC26 BD06 BD10 4D029 AA09 AB06 4G035 AB25 4G078 AA13 AB20 BA05 CA06 DA19 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Kosuke Nakata 2-9-1 Sellohori, Nishi-ku, Osaka-shi Industry Co., Ltd. F-term (reference) 4D028 BC24 BC26 BD06 BD10 4D029 AA09 AB06 4G035 AB25 4G078 AA13 AB20 BA05 CA06 DA19
Claims (7)
ューブと、ドラフトチューブ内に位置し、かつモーター
により駆動軸を介して回転される撹拌手段とを具備し、
撹拌手段が、その撹拌羽根の回転によりドラフトチュー
ブ内に下降流を発生させて同チューブ下端からその外部
を経て上端へ液を循環させる撹拌装置において、撹拌手
段の撹拌羽根の上流側に散気手段が設けられていること
を特徴とする曝気撹拌装置。1. A draft tube vertically arranged in a treatment tank, and a stirring unit located in the draft tube and rotated by a motor via a drive shaft.
In the stirring device in which the stirring means generates a downward flow in the draft tube by the rotation of the stirring blade and circulates the liquid from the lower end of the tube to the upper end through the outside thereof, an aeration means is provided upstream of the stirring blade of the stirring means. An aeration and agitation device characterized by being provided.
設けられていることを特徴とする請求項１記載の曝気撹
拌装置。2. The aeration stirring device according to claim 1, wherein a bubble guide is provided between the air diffusing means and the stirring blade.
を発生させる散気板または散気管であることを特徴とす
る請求項１または２記載の曝気撹拌装置。3. The aeration and agitation device according to claim 1, wherein the air diffuser is an air diffuser or an air diffuser that generates fine bubbles of 100 μm or less.
羽根の上流側にて同チューブ内面に沿って配されたドー
ナツ状の散気板または散気管であることを特徴とする請
求項１〜３のいずれかに記載の曝気撹拌装置。4. The donut-shaped air diffusing plate or air diffusing tube arranged along the inner surface of the draft tube on the upstream side of the stirring blade in the draft tube. The aeration stirring apparatus in any one of 3.
羽根の上流側にて同チューブ外部に同心状に配されたド
ーナツ状の散気板または散気管であることを特徴とする
請求項１〜３のいずれかに記載の曝気撹拌装置。5. The diffusing means is a donut-shaped diffusing plate or a diffusing tube concentrically arranged outside the tube on the upstream side of the stirring blade in the draft tube. The aeration stirring apparatus in any one of -3.
放射状に配された多数の散気管または散気板であること
を特徴とする請求項１〜３のいずれかに記載の曝気撹拌
装置。6. The aeration stirring apparatus according to claim 1, wherein the air diffuser is a large number of air diffusers or air diffusers radially arranged on the outside of the draft tube.
面から下方０．３〜３ｍであることを特徴とする請求項
３〜６のいずれかに記載の曝気撹拌装置。7. The aeration stirring apparatus according to claim 3, wherein the level of the diffuser plate or diffuser tube is 0.3 to 3 m below the processing liquid surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001248973A JP2003053371A (en) | 2001-08-20 | 2001-08-20 | Aeration mixing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001248973A JP2003053371A (en) | 2001-08-20 | 2001-08-20 | Aeration mixing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003053371A true JP2003053371A (en) | 2003-02-25 |
Family
ID=19078051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001248973A Pending JP2003053371A (en) | 2001-08-20 | 2001-08-20 | Aeration mixing apparatus |
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| Country | Link |
|---|---|
| JP (1) | JP2003053371A (en) |
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|---|---|---|---|---|
| WO2004009500A1 (en) * | 2002-07-22 | 2004-01-29 | C & R Co. | Sewage treatment process by activated-sludge method comprising line atomizing treatment |
| JP2008012475A (en) * | 2006-07-07 | 2008-01-24 | Sumitomo Heavy Industries Environment Co Ltd | Stirring impeller, underwater stirring device, and underwater stirring aerator |
| JP2010172842A (en) * | 2009-01-30 | 2010-08-12 | Nippon Refine Kk | Gas-liquid reaction method and apparatus using microbubble |
| KR101043006B1 (en) * | 2009-06-30 | 2011-06-21 | (주)우진 | Operation method of anaerobic basin by optical stir |
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| CN102897905A (en) * | 2012-09-26 | 2013-01-30 | 冯秀娟 | Activated sludge reactor |
| JP2014517769A (en) * | 2011-05-25 | 2014-07-24 | レール・リキード−ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | Equipment for injecting gas into the sewage tank |
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| CN106134608A (en) * | 2016-06-24 | 2016-11-23 | 苏州美丽澄电子技术有限公司 | Booth microbubble spring application cleaning structure |
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| JP7474601B2 (en) | 2020-02-18 | 2024-04-25 | アクアス株式会社 | Gas-liquid dispersion device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2012125691A (en) * | 2010-12-15 | 2012-07-05 | Metawater Co Ltd | Aeration agitator |
| JP2014517769A (en) * | 2011-05-25 | 2014-07-24 | レール・リキード−ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | Equipment for injecting gas into the sewage tank |
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| CN106607004A (en) * | 2015-10-21 | 2017-05-03 | 中国石油化工股份有限公司 | Circulation mixer and application thereof |
| CN106134608A (en) * | 2016-06-24 | 2016-11-23 | 苏州美丽澄电子技术有限公司 | Booth microbubble spring application cleaning structure |
| JP7474601B2 (en) | 2020-02-18 | 2024-04-25 | アクアス株式会社 | Gas-liquid dispersion device |
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